Weather strip



April 18, 1933. MA 1,904,491

WEATHER STRIP Filed June 12, 1951 Z INVENTOR Jo/m ail/um ATT 'E 'I Patented Apr. 18, I933 OF NEW YORK, N. "3., ASSIGNOR T0 B. C. METAL CORR, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK WEATHER STRIP Application filed June 12, 1931. Serial No. 548,853.

The objects of this invention are provide a practical efficient Weatherstrip for casement windows and the like, which may be readily applied to the window structure at any time, which will automatically adjust itself to inequalities to form a close seal and which, with all these advantages may be inexpensively produced.

The drawing accompanying and forming part of this specification illustrates certain practical embodiments of the invention, but it is wished to be understood that the structure may vary from these particular illustrations without departure from 'the true spirit and broad scope of the invention.

Fig. 1 is a perspective view of a-case ment window equipped with the invention; Fig.- 2 is an enlarged and fragmentary vertical sectional view of portions of the sash and frame illustrating the operation and effect of the Weatherstrip; Fig. 3 is a fragmentary and further enlarged cross sectional detail of the Weatherstrip; Fig. 4 is a cross sectional detail showing an embodiment of the invention in use on a wooden window frame.

In casement windows of the metallic type, the window frame and the sash are usually made 11 of angular sections, such" as the socalled -shapes shown in detail in Fig. 2, wherein the glazing 5 is set in a sash 6 having inner and outer reversely extending flanges 7, 8, for cooperation respectively with the inner and outer reversely extending flanges 9, 10 of the window frame member 11. These angular sections are produced by rolling and other methods having a tendency to leave slight inequalities in the surface smoothness and the painting and finishing of these frame members produce further'inequalities, tending to prevent an absolute tight seal between the sash and the frame.

To furnish a proper seal under all such conditions, the present invention comprises a compressible or resilient weathering strip and a special mounting for the same by which said strip after accommodating itself to surface irregularities may yield freely in the direction of window closing movement to fit itself to any peculiar unevenness in the shape of the frame and sash.

In the resent disclosure, the weatherin consists of a strip 12 of felt or the like, an the same is seated in a substantially. U- shaped groove or channel 13, faced toward the sash and carried at the end of a spring support 14.

Usually, the strip holding channel and its spring support are formed integrally of suitable spring sheet metal, with the channel consisting of substantially arallel sides 15, 16, connected by an angu arly related back wall 17 and with the one side wall 16 bent backover in flat engagement on an angular extension 18 at the end of the spring arm portion 14. This construction braces the trough which holds the weathering without interfering with the free flexing characteristics of the spring support. For metallic easements and the like, where a flange like that indicated at 9 is available on the frame, the weathering support is equipped with a channel to fit over such flange. This channel is shown as formed b a wall 19, doubled back over the face 0 the spring support, with an angularly bent back wall 20, clear of the doubledwalls 16, 18, of the trough and a second wall 21, parallel with wall 19, to complete the three sided channel for engagement over the stop flange.

The flanges of the frame are usually rolled with a taper towards the edges of the same and so without special provision, there will be a tendency for the weatherstrips to slip off the flanges. To overcome such tendency and securely fasten the support in position, the outer wall 21 of the channel may be formed with an inwardly bent or introverted tongue, flange or lug 22, and the stop flange of the frame is preferably rolled, formed or cut with ridges, corrugations or roughened portions 23, to serve as anchorages or seats for the edge of the inturned flange 22, which then serves in the nature of a spring holding pawl. These indentations, corrugations,

punch marks or the like, may be formed in the angular sections at the time of manufacture, or be produced by suitable tools at any time, either before or after assembly in the window structure. The flange 22, which forms the spring holding pawl may be shtted or cut to orm independently acting spring holdin lugs or teeth as in Fig. 3. The outer wafi 21 of the channel is shown as of less depth than the inner wall 19, since it is positively held in place by the integral spring awl structure and also is held between tl fe sash and stop flange, as mdicated m in Fig. 2. The inner wall 19 is somewhat deeper to carry the spring arm portlon 14 far enough back to give it such resiliency that it may flex independently of the spring hinge portion 24 at t e point of attachment,

thus enabling the spring support to freely adapt itself to varying contours of sash and frame.

In the case. of wooden frame casement windows and the like, where usually there go is no narrow stop flange, such as shown at 9,

but instead a comparatively wide facewooden stop strip 25, Flg. 4, the mounting channel is omitted and the spring supporting wall 14 is entered in a slot 26, cut in the edge of 25 the stop strip and suitably held there as by means of brads 27 driven from the face of the stop strip into the entered portion of the spring supporting wall. In this construction, the flexibility of the trough sup ort 1s 30 limited, depending on the'extent to w ich it is inserted on the slot and also according to the tightness with which it fits in the slot.

These conditions ma be governed to give the weathering troug the desired degree of flexibility. I

As will be clear particularly from Fi s. 2, 3 and 4, the weathering projects from t e face of the stop strip, so as to be engaged by the sash structure in the closing move- 40 ment of the window and the relatively long spring support 14, enables the weathering to fit itself to the sash andto yield freely as much as needed to permit the Window to close. a

The Weatherstrip is easily applied, by forcing the mounting channel over'the stop flange in the case of metal windows or by securing the spring support in the slot in the case of wooden window structures. In the first instance, if the sto flange is not already provided with loc ing seats for the spring pawl, then a special punch may be used to form the same in the outer face of the stop flange. In the second case, if no slot has been provided in the wooden stop strip, then this slot 26 may be cut in with a special saw.

The strip may be rolled or otherwise formed in continuous or convenient lengths or in lengths to suit standard size windows. Fig. 1 shows at 28 how such standard length strips may be bevelled at the ends to fit as a complete 'seal about the window frame. The spring supporting of the strip troughs is of special advantage in mounting the sections of Weatherstripping, enabling the trough portions to be bent back out of the way in the act of assembling the sections in the window frame.-

The structure is practical from the manufacturing standpoint and fully meets necessary requirements. While the at-present preferred embodiments have been illustrated, the structure may be modified to meet special requirements as Will be apparent from the broad scope of the claims.

What is claimed is:

1. Weatherstripping comprising a continuous section of sheet material transversely bent in the form of a channel to fit over a stop flange of a casement window, a spring supporting arm reflexed from the inner wall of said channel and an outwardly facin open trough portion at the end of sai spring arm over and free of the back of the mounting channel and thereby freely yieldable inwardly away from the channel and a resilient weathering strip seated in said outwardly faced inwardly yieldable trough.

2. Weatherstripping comprising a continuous section of sheet material transversely bent in the form of a channel to fit over 'a stop flange of a casement window, a spring supporting arm reflexed from the inner wall of said channel and an outwardly fat:- ing open trough portion at the end of said spring arm over and free of the back of the mounting channel and thereby freely yieldable inwardly away from the channel and a resilient weathering strip seated in said outwardly faced inwardly yieldable trough, the outer wall of the mounting channel having an introverted extension forming an internal spring holding pawl for engagement with the stop flange of the window frame.

3. The combination in a casement window structure, comprising a frame having a stop flange and a swinging sash for cooperation with said stop flange, of an integral sheet metal holder folded in the form of a channel fitting over said stop flange and a spring portion folded back from the edge of the inside wall of said channel, said spring portion having an outwardly bent partat the free end of the same doubled back and then reversed to form an open trough facing outwardly of flange and a swinging sash for cooperation with said stop flange, of an integral sheet metal holder folded in the form of a channel fitting over said stop flange and a spring portion folded back from the edge of the inside wall of said channel, said spring portion having an outwardly bent part at the free end of the same doubled back and then reversed to form an open trough facing outwardly of the window frame, a packing strip seated in said trough and supported by the spring portion freely yieldable inwardly under the closing force of the sash, the edge of the outer wall of the mounting channel being introverted to form an internal spring locking pawl and the outer face of the stop flange being roughened for interlocking engagement with said spring holding pawl.

5. The combination in a casement window structure, comprising a frame having a stop flange and a swinging sash for cooperation with said stop flange, of an integral sheet metal holder folded in the form of a channel fitting over said stop flange and a spring portion folded back from the edge of the inside Wall of said channel, said spring portion having an outwardly bent part at the free end of the same doubled back and then reversed to form an open trough facing outwardly of the window frame, a packing strip seated in said trough and supported by the spring portion freely yieldable inwardly under the closing force of the sash, the edge of the outer wall of the mounting channel being introverted to form an internal spring locking pawl and the outer face of the stop flange being roughened for interlocking engagement with said spring holding pawl, said introverted flange being cut to provide separate spring tongues independently yieldable in interlocking engagement with the roughened portions of the stop flange.

6. Weatherstripping for casement windows, comprising in combination, a sheet metal strip folded transversely in a U- shaped channel at one edge to fit over the stop flange of a casement window frame and folded transversely at the opposite edge in an open trough faced substantially at {a right angle to the channel and having a spring supporting portion extending from the back of said trough to one edge of the sion projecting from said double thickness portion, said trough being disposed with the open side of the same adjacent the opposite side of the U-shaped channel, whereby the reflexed portion supporting the trough may freely yield away from the channel under pressure in the open trough and packing material in said open trough and thereby supported in freely yieldable relation on the channel.

8. Weatherstripping for casement windows or the like, comprising a sheet metal strip folded transversely in a U-shaped channel to fit over a stop flange and having an extension portion bent back from one edge of said channel and doubled upon itself over the back of the channel, said doubled portion forming one side of an open trough and the back and opposite side of said open trough being formed by an extension projecting from said double thickness portion, said trough being disposed with the open side of the same adjacent the o posite side of the U-shaped channel, where y the reflexed portion supporting the trough may freely yield away from the channel under pressure in the open trough and packing material in said open trough and thereby supported in freely yieldable relation on the channel, said opposite edge portion of the channel having an extension part introverted into the channel to hold the channel on the stop flan e in line with the ressure applied to the pac ing in the trough.

In testimony whereof I afiix my signature.

JOHN MANHAN.

channel and whereby said trough portion may unrestrainedly yield backward away from the channel portion and a strip of resilient packing seated in the trough and supported by the spring portion to yield backward away from the channel portion under the pressure of a window sash engaged therewith.

7 Weatherstripping for casement windows or the like, comprising a sheet metal strip folded transversely in a U-shaped channel to fit over a stop flange and having an extension portion bent back from one edge of said channel and doubled upon itself over the back of the channel, said. doubled portion forming one side of an open trough and the back and opposite side of said open trough being formed by an exten- 

